2116869871 has 2 divisors, whose sum is σ = 2116869872. Its totient is φ = 2116869870.

The previous prime is 2116869851. The next prime is 2116869901. The reversal of 2116869871 is 1789686112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2116869871 - 2¹³ = 2116861679 is a prime.

It is a super-2 number, since 2×2116869871² = 8962276101495113282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2116869851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058434935 + 1058434936.

It is an arithmetic number, because the mean of its divisors is an integer number (1058434936).

Almost surely, 2^2116869871 is an apocalyptic number.

2116869871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116869871 is an equidigital number, since it uses as much as digits as its factorization.

2116869871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 49.

The square root of 2116869871 is about 46009.4541480335. The cubic root of 2116869871 is about 1283.9991037138. Note that the first 3 decimals are identical.

The spelling of 2116869871 in words is "two billion, one hundred sixteen million, eight hundred sixty-nine thousand, eight hundred seventy-one".